.add_det{
    position: fixed;
    top: calc(50vh - 120px);
    right: 0px;
    width: 90px;
    height: 250px;
    background: green !important;
    overflow: hidden;
    z-index: 999;
}
.add_det > div {
    width: 100%;
    height: 50px;
    line-height: 50px;
    text-align: center;
    border-bottom: 1px solid #000;
    color: #000;
    background: #ccc;
    justify-content: center;
    align-items: center;
}

.add_user,.add_book,.add_reader,.add_borrow,.add_back{
    display: none;
}
.add_user {
    display: flex;
}
#a_user{
    background: rgb(243,169,31);
    font-size: 18px;
    color: #fff;
}





/* 新增用户 */
.changeInfo{
    width: 600px;
    height: 340px;
    position: fixed;
    z-index: 999;
    top: calc(50vh - 200px);
    left: calc(50vw - 300px);
    background: #fff;
    box-shadow: 0px 0px 8px 4px #333;
}
.changeInfo > div {
    width: 100%;
    height: 60px;
    text-align: center;
    line-height: 80px;
    font-size: 28px;
    font-weight: bolder;
}
.changeInfo > ul {
    width: 100%;
    height: 200px;
    /* border: 1px solid red; */
    padding: 30px 50px 20px 50px;
    list-style: none;
}
.changeInfo > ul > li{
    width: 100%;
    height: 50px;
    /* border: 1px solid red; */
    display: flex;
    align-items: center;
}

.changeInfo > ul > li > label{
    width: 100px;
    text-align: center;
}
.changeInfo > ul > li > input{
    flex: 1;
    height: 40px;
    line-height: 40px;
    padding-left: 20px;
    font-size: 18px;
}
.btu_box{
    width: 100%;
    height: 50px;
    /* border: 1px solid red; */
    padding: 0px 30%;
    display: flex;
    align-items: center;
    justify-content: space-around;
}
.btu_box > button{
    width: 60px;
    height: 40px;
}


/* 新增图书 */

.changeInfo_book{
    width: 600px;
    height: 540px;
    position: fixed;
    z-index: 999;
    top: calc(50vh - 270px);
    left: calc(50vw - 300px);
    background: #fff;
    box-shadow: 0px 0px 8px 4px #333;
}
.changeInfo_book > div {
    width: 100%;
    height: 60px;
    text-align: center;
    line-height: 80px;
    font-size: 28px;
    font-weight: bolder;
}
.changeInfo_book > ul {
    width: 100%;
    height: 400px;
    /* border: 1px solid red; */
    padding: 30px 50px 20px 50px;
    list-style: none;
}
.changeInfo_book > ul > li{
    width: 100%;
    height: 50px;
    /* border: 1px solid red; */
    display: flex;
    align-items: center;
}

.changeInfo_book > ul > li > label{
    width: 100px;
    text-align: center;
}
.changeInfo_book > ul > li > input{
    flex: 1;
    height: 40px;
    line-height: 40px;
    padding-left: 20px;
    font-size: 18px;
}


/* 新增读者 */

.changeInfo_reader{
    width: 600px;
    height: 420px;
    position: fixed;
    z-index: 999;
    top: calc(50vh - 210px);
    left: calc(50vw - 300px);
    background: #fff;
    box-shadow: 0px 0px 8px 4px #333;
}
.changeInfo_reader > div {
    width: 100%;
    height: 60px;
    text-align: center;
    line-height: 80px;
    font-size: 28px;
    font-weight: bolder;
}
.changeInfo_reader > ul {
    width: 100%;
    height: 280px;
    /* border: 1px solid red; */
    padding: 30px 50px 20px 50px;
    list-style: none;
}
.changeInfo_reader > ul > li{
    width: 100%;
    height: 50px;
    /* border: 1px solid red; */
    display: flex;
    align-items: center;
}

.changeInfo_reader > ul > li > label{
    width: 100px;
    text-align: center;
}
.changeInfo_reader > ul > li > input{
    flex: 1;
    height: 40px;
    line-height: 40px;
    padding-left: 20px;
    font-size: 18px;
}


/* 借书 */

.changeInfo_borrow{
    width: 600px;
    height: 360px;
    position: fixed;
    z-index: 999;
    top: calc(50vh - 210px);
    left: calc(50vw - 300px);
    background: #fff;
    box-shadow: 0px 0px 8px 4px #333;
}
.changeInfo_borrow > div {
    width: 100%;
    height: 60px;
    text-align: center;
    line-height: 80px;
    font-size: 28px;
    font-weight: bolder;
}
.changeInfo_borrow > ul {
    width: 100%;
    height: 240px;
    /* border: 1px solid red; */
    padding: 30px 50px 20px 50px;
    list-style: none;
}
.changeInfo_borrow > ul > li{
    width: 100%;
    height: 50px;
    /* border: 1px solid red; */
    display: flex;
    align-items: center;
}

.changeInfo_borrow > ul > li > label{
    width: 100px;
    text-align: center;
}
.changeInfo_borrow > ul > li > input{
    flex: 1;
    height: 40px;
    line-height: 40px;
    padding-left: 20px;
    font-size: 18px;
}


/* 还书 */

.changeInfo_back{
    width: 600px;
    height: 300px;
    position: fixed;
    z-index: 999;
    top: calc(50vh - 210px);
    left: calc(50vw - 300px);
    background: #fff;
    box-shadow: 0px 0px 8px 4px #333;
}
.changeInfo_back > div {
    width: 100%;
    height: 60px;
    text-align: center;
    line-height: 80px;
    font-size: 28px;
    font-weight: bolder;
}
.changeInfo_back > ul {
    width: 100%;
    height: 180px;
    /* border: 1px solid red; */
    padding: 30px 50px 20px 50px;
    list-style: none;
}
.changeInfo_back > ul > li{
    width: 100%;
    height: 50px;
    /* border: 1px solid red; */
    display: flex;
    align-items: center;
}

.changeInfo_back > ul > li > label{
    width: 100px;
    text-align: center;
}
.changeInfo_back > ul > li > input{
    flex: 1;
    height: 40px;
    line-height: 40px;
    padding-left: 20px;
    font-size: 18px;
}